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NEETPhysicsRotational Motion

Two identical discs of same radius R are rotating about their axes in opposite directions with the same constant angular speed . The discs are in the same horizontal plane. At time t=0 , the points P and Q are facing each other as shown in the figure. The relative speed between the two points P and Q is v_ r . In one time period (T) of rotation of the discs, v_ r as a function of time is best represented by

Correct answer

0

Step-by-step solution

At t=0, t= T 2 and t=T therelative velocity will bezero. At t= T 4 and t= 3 T 4 , the relative velocity will be maximum in magnitude Hence graph (a) correctly depicts v_ r versus t graph.

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